The use of colloidal gas aphrons as novel downstream processing for the recovery of astaxanthin from cells of<i>Phaffia rhodozyma</i>

Dermiki, Maria; Gordon, M. H.; Jauregi, Paula

doi:10.1002/jctb.1855

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…Dermiki et al 80 recovered astaxanthin, a natural xanthophyll antioxidant, from the cells of Phaffia rhodozyma using CGA suspension for the separation. Up to 90% recovery was achieved at pH 11 with NaOH 0.2 mol L −1 using CGAs generated from the cationic surfactant CTAB.…”

Section: Application Of Cgasmentioning

confidence: 99%

Application of colloidal gas aphrons for pollution remediation

Hashim

Mukhopadhyay

Sengupta

et al. 2012

J of Chemical Tech & Biotech

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Colloidal gas aphrons (CGAs), first described by Felix Sebba in his book Foams and Biliquid Foams -Aphrons in 1987, consist of a system of spherical microbubbles with diameters mostly above 25 µm and classified as kugelschaums (ball foam). They possess some colloidal properties and can be pumped at uniform rate through pipes and channels, much like liquids. Also, they have high stability due to very small size and thick surfactant shells. Research work published over the past two decades indicate effective applications of CGAs for clarification of particles and microorganisms, protein separation, gas and nutrient transfer and pollutant separation from water and soil matrices. In this review paper, the techniques for generating CGAs and their application to pollution abatement are discussed. Some mineral separation processes by CGA flotation have also been reviewed because of their relevance to contaminant removal processes. The CGAs were found to function on the principles of bubble entrained floc flotation, electrostatic and ionic interaction, diffusion of entrapped gas and hydrophobicity of the pollutant particles. Two tables have also been provided to present a comparative overview of the generation technologies and the effectiveness of pollution remediation techniques.

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Section: Application Of Cgasmentioning

confidence: 99%

Application of colloidal gas aphrons for pollution remediation

Hashim

Mukhopadhyay

Sengupta

et al. 2012

J of Chemical Tech & Biotech

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“…In light of their favorable properties, researchers have considered various applications of CGA, with a particular focus on the separation processes [27]. They have been successfully used to recover proteins from whey [28], polyphenols from wine waste extracts [25], carotenoids from plant extracts [22], astaxanthin particles from a fermentation mixture containing yeast cells [29], and pulp fibers from paper machine backwater [30].…”

Section: Introductionmentioning

confidence: 99%

Separation of natural colorants from the fermented broth of filamentous fungi using colloidal gas aphrons

Santos-Ebinuma

Teixeira

Pessoa

et al. 2016

Separation and Purification Technology

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There is a worldwide interest in the development of processes for producing colorants from natural sources. Microorganisms provide an alternative source of natural colorants produced by cultivation technology and extracted from the fermented broth. The aim of the present work was to study the recovery of red colorants from the fermented broth of Talaromyces amestolkiae using the technique of colloidal gas aphrons (CGA) comprising surfactant-stabilized microbubbles. Preliminary experiments were performed to evaluate the red colorants' solubility in different organic solvents, octanol/water partitioning, and their stability in surfactant solutions, namely hexadecyl trimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and polyoxyethylenesorbitan monolaurate (Tween 20), which are cationic, anionic and nonionic surfactants, respectively. The first recovery experiments were carried out using CGA generated by these surfactants at different volumetric ratios (V R , 3-18). Subsequently, two different approaches to generate CGA were investigated at V R values of 6 and 12: the first involved the use of CTAB at pH 6.9-10.0, and the second involved the use of Tween 20 using red colorants partially dissolved in ethanol and Tween 20. The characterization results showed that red colorants have a hydrophilic nature. The highest recoveries were obtained with Tween 20 (78%) and CTAB (70%). These results demonstrated that the recovery of the colorants was driven by both electrostatic and hydrophobic interactions. The V R was found to be an important operating parameter and at V R 12 with CTAB (at pH 9) maximum recovery, partitioning coefficient (K = 5.39) and selectivity in relation to protein and sugar (S P = 3.75 and S S = 7.20 respectively) were achieved. Furthermore, with Tween 20, the separation was driven mainly by hydrophobic interactions. Overall CGA show promise for the recovery of red colorants from a fermented broth. Although better results were obtained with CTAB than with Tween 20 the latter may be more suitable for some application due to its lower toxicity.

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“…Recientemente ha aumentado el interés por las extracciones y separaciones basadas en surfactantes, debido a que tienen unos bajos requerimientos en energía, los surfactantes pueden reciclarse y reutilizarse y son capaces de tratar fácilmente los compuestos degradados. Uno de los métodos que se ha estudiado es la posibilidad de utilizar microburbujas de gas coloidal estabilizadas por surfactantes generadas por la agitación a gran velocidad del surfactante y situadas en una columna de flotación ("aprhones" del inglés "aphrons") para extraer la astaxantina de la levadura (Dermiki et al, 2008;Dermiki et al, 2009), que son (figura 1.14.). Dependiendo del tipo de surfactante utilizado (catiónico, aniónico o no-iónico), la superficie externa de la microburbuja será de una forma u otra permitiendo controlar la selectividad de la adsorción molécula-burbuja.…”

Section: Extracción De La Astaxantinaunclassified

Estudio de la producción de astaxantina por Xanthophyllomyces dendrorhous = Study of astaxanthin production by Xanthophyllomyces dendrorhous

Guerra¹

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X 3.3.6.2. Producción de pigmentos en transformantes con pIM-Pgdh/crtS 3.4. ESTUDIO DE LA FUNCIÓN DEL GEN crtS: complementación de la cepa ATCC 3.4.1. Sustitución de los promotores y terminadores de los genes crtW y crtZ de Paracoccus sp. N81106 3.4.2. Complementación de la cepa ATCC 96815 con los genes crtW y crtZ de Paracoccus sp. 81108 3.4.3. Complementación de la cepa ATCC 96815 con el gen crtH1 de Adonis aestivalis

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The use of colloidal gas aphrons as novel downstream processing for the recovery of astaxanthin from cells ofPhaffia rhodozyma

Cited by 14 publications

References 39 publications

Application of colloidal gas aphrons for pollution remediation

Application of colloidal gas aphrons for pollution remediation

Separation of natural colorants from the fermented broth of filamentous fungi using colloidal gas aphrons

Estudio de la producción de astaxantina por Xanthophyllomyces dendrorhous = Study of astaxanthin production by Xanthophyllomyces dendrorhous

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